Portable spa cover lock



FIG. 1 is an exploded top perspective view of a portable spa cover lock, showing my new design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a bottom perspective view thereof;

FIG. 4 is a left-side elevational view thereof, the right-side elevational view being a mirror image thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a front elevational view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines showing a key and spa in FIG. 1 depict environmental matter and form no part of the claimed design. The remaining broken lines represent portions of the portable spa cover lock that form no part of the claimed design. 

CLAIM The ornamental design for a portable spa cover lock, as shown and described. 